The first term and last term of an AP are 33 and -57 respectively. If there are 16 terms in the series, then what will be sum?

Correct option is B

​Given:

First term a = 33

Last term l = -57

Number of terms n = 16

Formula Used:

​$$S_n = \frac{n}{2} (a + l)$$​​

Solution:

​$$S_{16} = \frac{16}{2} (33 + (-57)) = 8 \times (-24) = -192$$​​